基于visualc++6.0的ddl编程实现.htm

我在网上收集的一些有关vcDLL编程的文章。

  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>1</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>）使用导出函数关键字</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>_declspec(dllexport)</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>创建</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.dll</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，该动态链接库中有两个函数，分别用来实现得到两个数的最大和最小数。在</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.h</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>和</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDLL.cpp</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件中分别输入如下原代码：</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'><br>
  <br>
  <br>
  //MyDLL.h<br>
  extern &quot;C&quot; _declspec(dllexport) int Max(int a, int b);<br>
  extern &quot;C&quot; _declspec(dllexport) int Min(int a, int b);<br>
  //MyDll.cpp<br>
  #include<br>
  #include&quot;MyDll.h&quot;<br>
  int Max(int a, int b)<br>
  {<br>
  if(a&gt;=b)return a;<br>
  else<br>
  return b;<br>
  }<br>
  int Min(int a, int b)<br>
  {<br>
  if(a&gt;=b)return b;<br>
  else<br>
  return a;<br>
  } <br>
  <br>
  </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
  Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>　　该动态链接库编译成功后，打开</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>工程中的</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>debug</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>目录，可以看到</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.dll</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>、</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.lib</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>两个文件。</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>LIB</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件中包含</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件名和</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件中的函数名等，该</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>LIB</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件只是对应该</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件的</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>&quot;</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>映像文件</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>&quot;</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，与</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件中，</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>LIB</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件的长度要小的多，在进行隐式链接</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>时要用到它。读者可能已经注意到在</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.h</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>中有关键字</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>&quot;extern C&quot;</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，它可以使其他编程语言访问你编写的</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>中的函数。</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'><br>
  <br>
  </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
  Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>　　</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>2</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>）用</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>.def</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件创建工程</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll<br>
  <br>
  </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
  Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>　　为了用</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>.def</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件创建</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，请先删除上个例子创建的工程中的</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.h</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件，保留</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.cpp</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>并在该文件头删除</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>#include MyDll.h</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>语句，同时往该工程中加入一个文本文件，命名为</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.def</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，再在该文件中加入如下代码：</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'><br>
  <br>
  LIBRARY MyDll<br>
  EXPORTS<br>
  Max<br>
  Min<br>
  <br>
  </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
  Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>　　其中</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>LIBRARY</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>语句说明该</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>def</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件是属于相应</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>的，</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>EXPORTS</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>语句下列出要导出的函数名称。我们可以在</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>.def</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件中的导出函数后加</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>@n</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，如</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>Max@1</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>Min@2</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>，表示要导出的函数顺序号，在进行显式连时可以用到它。该</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>DLL</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>编译成功后，打开工程中的</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>Debug</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>目录，同样也会看到</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.dll</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>和</span><span
  lang=EN-US style='mso-bidi-font-size:10.5pt;font-family:Tahoma'>MyDll.lib</span><span
  style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:Tahoma;
  mso-hansi-font-family:Tahoma;mso-bidi-font-family:Tahoma'>文件。</spa